drm/xe: improve XE_DISPLAY dependency chain
The XE_DISPLAY driver is not really dependent on ACPI nor on DRM_FBDEV_EMULATION, but parts of it are.
So, rework the dependency chain to ensure that the xe display code will be enabled, when ACPI is disabled. We can do the same for intel_fbdev, which is only needed when DRM_FBDEV_EMULATION is set.